Codan MT-3 - Page 64

TN600 AC-3E Audio Control Card
MT-3/4 Radio Systems
TECHNICAL NOTES
Page 2 of 2
LMRSALES@CODANCOMMS.COM
CODANCOMMS.COMTECHNICAL NOTE:
TN600, REV 6-0-0, © May 2014
CANADA/US +1 250 382 8268 | TOLL FREE +1 800 664 4066
Although the Audio Control Card can be confi gured to work in various confi gurations with add-in options and
functionality, the three main functions of the AC-3E Audio Control Card are shown in Figures 1, 2 and 3:
Figure 1: Repeater Control Figure 2: CTCSS Control
Figure 3: Audio Routing
RXA
COR
CORA
INHIBIT
TXA
PTT
PTTA
INHIBIT
CORA -> PTTA
JUMPER
CORA -> PTTB
JUMPER
RXB
COR
CORB
INHIBIT
TXB
PTT
CORB -> PTTA
JUMPER
CORB -> PTTB
JUMPER
AUX1
COR
AUX1
PTT
AUX2
PTT
AUX2
COR
OPTO
ISOLATORS
AUXILIARY CONNECTIONS
REPEATER
INTER
CONNECTIONS
HANG
TIMER
A
HANG
TIMER
B
PTTB
INHIBIT
RXA
DISCRIMINATOR
O/P
Jumper
Selection
CTCSS
DECODER
RXA
MUTE
TXA
SUBTONE
I/P
OPTIONAL
CTCSS
ENCODER
Jumper
Selection
RXA
BALANCED
O/P
TO AUDIO ROUTING
RXB
DISCRIMINATOR
O/P
Jumper
Selection
CTCSS
DECODER
RXB
MUTE
TXB
SUBTONE
I/P
OPTIONAL
CTCSS
ENCODER
Jumper
Selection
RXB
BALANCED
O/P
TO AUDIO ROUTING
RXA BALANCED O/P
FROM CTCSS CONTROL
DISTRIBUTION
AMPLIFIER
AUDIO
GATES
AUDIO
LEVEL
CONTROLS
TXA AUDIO
TXB AUDIO
AUXILIARY AUDIO
TXA BALANCED
I/P
TXB BALANCED
I/P
AUX1 BALANCED
O/P
LINE
DRIVER
AMPLIFIERS
AUX1 BALANCED
I/P
AUDIO
GATE
AUDIO
LEVEL
CONTROL
RXB BALANCED O/P
FROM CTCSS CONTROL
DISTRIBUTION
AMPLIFIER
AUXILIARY AUDIO
AUX2 BALANCED
O/P
LINE
DRIVER
AMPLIFIERS
AUX2 BALANCED
I/P
AUDIO
GATE
AUDIO
LEVEL
CONTROL
RECEIVER A
RECEIVER B
R13
R9
R5
R120
R123
R52
R56
R48
C19
C20
B14
A14
A11
B11
C1
C3